guix: use elfesteem 2eb1e5384ff7a220fd1afacd4a0170acff54fe56

Our patch has been merged upstream, see
https://github.com/LRGH/elfesteem/pull/3

contrib/guix/patches/elfsteem-value-error-python-39.patch

@@ -1,13 +0,0 @@
-diff --git a/examples/otool.py b/examples/otool.py
-index 2b8efc0..d797b2e 100755
---- a/examples/otool.py
-+++ b/examples/otool.py
-@@ -342,7 +342,7 @@ if __name__ == '__main__':
-         try:
-             e = macho_init.MACHO(raw,
-                 parseSymbols = False)
--        except ValueError, err:
-+        except ValueError as err:
-             print("%s:" %file)
-             print("    %s" % err)
-             continue